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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimir: 2150-766X
ISSN On-line: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v7.i6.30
pages 491-506

INFLUENCE OF AP PARTICLE SIZE ON THE BURNING CHARACTERISTICS OF AN/AP-BASED COMPOSITE PROPELLANTS

Makoto Kohga
The National Defense Academy Yokosuka, Kanagawa 239-8686 JAPAN
Saeko Yoshida
The National Defense Academy Yokosuka, Kanagawa 239-8686 JAPAN
Kazuo Hasue
The National Defense Academy Yokosuka, Kanagawa 239-8686 JAPAN

RESUMO

The burning characteristics of AN/AP-based propellants prepared with AP of various particle sizes were investigated to reveal the burning rate characteristics and the combustion wave structure model of AN/AP/HTPB propellant. The burning rate increases as the AP content increases, and the increment of the burning rate increases with decreasing the particle diameter of AP and rising of pressure. Some propellants prepared with small AP (below 69 μm) had a self-quenched or unstable combustion: partial flashing flame and flame propagation along the side of the propellant strand. The content of AP in the oxidizer of the propellant that had the self-quenched or unstable burning behavior was 0.4 and 0.6. The combustion pressures of these propellants did not remain constant and the pressure profiles showed violent variations. The burning rate characteristics of AN/AP-based propellants are remarkably affected by the particle size of AP and the AN/AP ratio. It was found that some of the AN/AP propellants prepared with fine AP would have a self-quenched or unstable burning behavior because of the remarkable heterogeneity of the combustion wave, i.e. the interference of the burning waves of AP and AN.

Referências

  1. Kuwahara, T. and Shinozaki, N., Ignition Characteristics of AN/Al//AP Composite Propellants.

  2. Kuwahara, T. and Matsuo, S., Burning Rate Characteristics and Ignition Characteristics of Ammonium Nitrate/Ammonium Perchlorate Composite Propellants.

  3. Kuwahara, T., Ignition Characteristics of Ammonium Nitrate/Ammonium Perchlorate Composite Propellants.

  4. Kishore, K. and Rajalekshmil, V.K., Combustion and Decomposition of a Mixed Oxidizer and Corresponding Propellant System.

  5. Kohga, M. and Hagihara, Y., Preparation of Fine Ammonium Perchlorate by Freeze-Drying.

  6. Sabadell, A.J., Wenograd, J., and Summerfield, M., Measurement of Temperature Profiles through Solid Propellant Flames Using Fine Thermocouples.

  7. Brewster, M.Q., Sheridan, T.A., and Ishihara, A., Ammonium Nitrate-Magnesium Propellant Combustion and Heat Transfer Mechanisms.

  8. Beckstead, M.W., Derr, R.L., and Price, C.F., A Model of Composite Solid-Propellant Combustion Based on Multiple Flames.

  9. Kohga, M. and Hagihara, Y., Self-Quenched Combustion of Fuel-Rich AP/HTPB Composite Propellant.

  10. Beckstead, M.W., Derr, R.L., and Boggs, T.L., Surface Structure of Ammonium Perchlorate Composite Propellants.

  11. Deer, R.L. and Boggs, T.L., Role of Scanning Electron Microscopy in the Study of Solid Propellant Combustion, Part III, The Surface Structure and Profile Characteristics of Burning Composite Solid Propellant.


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